When building llvm from git or svn it embeds the svn/git revision into internal version string

$ /mnt/a/oe/build/tmp/work/corei7-64-bec-linux/mesa/2_17.1.5-r0/recipe-sysroot/usr/lib/llvm5.0/llvm-config-host --version
5.0.0git-9a5c333388c

We need to ignore everything after 5.0.0 which is what the cut cmd is doing

Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>

Index: mesa-17.1.5/configure.ac
===================================================================
--- mesa-17.1.5.orig/configure.ac
+++ mesa-17.1.5/configure.ac
@@ -967,7 +967,7 @@ strip_unwanted_llvm_flags() {
 
 llvm_set_environment_variables() {
     if test "x$LLVM_CONFIG" != xno; then
-        LLVM_VERSION=`$LLVM_CONFIG --version | egrep -o '^[[0-9.]]+'`
+        LLVM_VERSION=`$LLVM_CONFIG --version | cut -c1-5`
         LLVM_CPPFLAGS=`strip_unwanted_llvm_flags "$LLVM_CONFIG --cppflags"`
         LLVM_INCLUDEDIR=`$LLVM_CONFIG --includedir`
         LLVM_LIBDIR=`$LLVM_CONFIG --libdir`
@@ -2560,7 +2560,7 @@ if test "x$enable_llvm" = xyes; then
     dnl (See https://llvm.org/bugs/show_bug.cgi?id=6823)
     if test "x$enable_llvm_shared_libs" = xyes; then
         dnl We can't use $LLVM_VERSION because it has 'svn' stripped out,
-        LLVM_SO_NAME=LLVM-`$LLVM_CONFIG --version`
+        LLVM_SO_NAME=LLVM-`$LLVM_CONFIG --version|cut -c1-5`
         AS_IF([test -f "$LLVM_LIBDIR/lib$LLVM_SO_NAME.$IMP_LIB_EXT"], [llvm_have_one_so=yes])
 
         if test "x$llvm_have_one_so" = xyes; then